Drilling appliance.



' No.'8'70,'70l. PATENTBD NOV. l2, 1907.

H. TYLDESLEY.

DRILLING APPLIANCE.

APPLICATION FILED HAR.1. 1907.

@vv-mmm I I tAf/7 yg UNITED STATES PATENT OFFICE.

HARRY TYLDESLEY, OF CENTRAL CITY, KENTUCKY, ASSIGNOR OF ONE-THIRD TO THOMAS TYLDESLEY AND ONE-THIRD TO MILTON P. CREEL, OF CENTRAL CITY, KENTUCKY.

DRILLING APPLIANCE.

No. 870,701. Specification of Letters Patent. Patented Nov. 12, 1907.

Application led March l, 1907. Serial No. 360,048.

To all whom it may concern: is in position between the arms 24, and has parallel Be it known that I, HARRY TYLDESLEY, a citizen arms 25 between which the arms 24 extend and are f the United States, residing at Central City, in the secured by a tongue and groove joint. county of Muhlenberg and State of Kentucky, have The drill-guide or templet herein described is placed invented certain new and useful Improvements in on top of the work 26 to be drilled and is firmly held 50 Drilling Appliances, of which the following is a speci-l thereon by standards 27 rising from the plates 22 and fication. 23 and secured to a collar 2S clamped to the head 12. This invention is a drilling-appliance, and more par- The collar is in two parts which embrace the head and ticularly a drill and a cooperating guide or templet for have at their abutting ends flanges 29 whereby they producing a square hole. are bolted together as at 30 and thus clamped to the 55 The object of the invention is to provide an applihead. The collar has projecting lugs 31 provided with ance of this kind which can be readily fitted to an vertical openings through which the standards 27 exordinary drilling machine, and also an adjustable tend and in which they are adjustably fastened by guide or templet. set-screws 32. This construction permits the drill- In the accompanying drawing, Figure 1 is a front guide to be adjusted vertically according to the thick- GO elevation showing the application of the invention. ness of the work 26 or the position of the table 14. Fig. 2 is a side elevation. Fig. 3 is a horizontal sec- In use, the drill-guide will be placed on the work tion on the line 3 3 of Fig. 1. Fig. 4 is a horizontal to be drilled and firmly secured thereon in the manner section on the line 4 4 of Fig. l. Fig. 5 is a transheretofore stated, with the hole 2l directly over that verse section on the line 5-5 of Fig. 4. Fig. 6 is a portion of the work where the hole is to be drilled. 65 plan view of the parts constituting the drill-guide or The drill is caused to enter the material through the templet showing them separated. hole 21 whereby it is guided to form a square hole. Referring speciiically to the drawing, 10 denotes Various sized holes can be drilled by changing the the column of a drilling machine and 11 one of the drill and the plates 19 and 20, and after the hole is arms thereof having a bearing head 12 for the drillstarted the plates can be removed, the hole already 70 spindle 13. The table on which the work to be drilled drilled then serving as a guide. "he plates 19`and 2O is placed is indicated at 14, The drill-spindle is fitted can be readily removed for this purpose by separating with a chuck 15 in which the drill 16 is held. The the plates 22 and 23 as shown in Fig. 6 and disconnectcross-section of the cutting end 17 ot' the drill is that ing the collar sections.

of an equilateral triangle, and above this the drill is I claini:- 75 tWiSlIed to form a Spiral groove 18 for the discharge O 1. The combination with a relatively fixed drill head the Chips through which the drill spindle extends, of a collar clamped around said head and having projecting lugs, a The gulde or templet fol the dun Compllses a pmr drill guide adapted to rest upon the work, and standards of eCte-ngulal Plates 19 and 20, respectively, each 0f fixed to the guide and extending upwardly therefrom and 8O which is recessed in Such a manner that when the through the lugs, and adjustably secured therein. l

plates are placed together with the recesses Opposite The combination with fixed drill head, Aof a drill h th 1 1 2l l t 1 Y guide comprising a l'raine ot separable parts, each part eafc 0j er a. Squale 1-0 e 1S mme( is Sloln 1n having a standard projecting upwardly therefrom beside Flg' 4 In Whlch hole the Cutmng Part 17 0f the dun the drill and fixed to the drill head, and opposite plates 85 Works. The plates 19 and 20 are lnOilnted in a rarne removably held in the frame and having a guide opening 40 which comprises two parts indicated at 22 and 23y therebetween through which the drill works.

I testiin )n whereof l alli.' sie-naure, in resence of respectively. The part 22 comprises a plate having twonwtnesses mi D two parallel arms 24, the space between which forms a recess 1n which the plates 1? and 20 tit and are'sewitnesses: cured by a tongue and groove joint. The part 23 is a .Tous rirriiim, plate which abuts against the plate 19 when the latter D. LAFFOLIN.

HARRY TYLDESLEY. 

